If you don't report them, is it possible to get a mod (dedicated to your ignore list) and start to nuke/ban those users? It would help a lot.
Also, if some public ignore list will exist (or more, other members could also share their ignore list), I would prefer a drop down list or radio button list to choose which public ignore list I would like to apply to me. I know that I can copy and paste it, but it would let lazy people (like myself ) use that function too, if it's one click instead of messing with copying and pasting...